一、菌种要适龄菌种以45～55天的菌龄生活力最强,凡菌龄不足或超龄的菌种应禁止使用。二、菌袋装料宜紧不宜松装料紧密硬实的菌袋,手抓或搬动不变形,袋内、外的空气就不会因此而对流交换,污染的机会就自然相对减少。为此,不管是手工装袋还是机器装袋,一定要装紧装实。三、装锅灭菌宜少不宜多菌袋进锅灭菌装入量以八分满为度,四周还要留出空隙,以利蒸气流 First, the strains to age-appropriate strain to 45 to 55 days of the strongest viability of the bacteria, where bacteria age or over-age species should be banned. Second, the bacteria bag should not be tight packing Loose packing material hard and rigid bacteria bags, hand or move without deformation, the bag will not be outside the air convection, the opportunity to naturally reduce the relative risk of pollution. To this end, whether it is hand-bagging or bagging, be sure to pack tightly. Third, install the pot sterilization should be no less than the amount of bacteria into the pot sterilization loading capacity of eight full for the degree, but also leave gaps around, to facilitate steam flow